Marguerite de Sablé was born abou 1179 in France to Robert de Sable and Clémence de Mayenne. She was the eldest of three children, only two of which survived to adulthood. Her brother, Robert, died as a child and her younger sister was Phillipa. Her father was a Grand Master of the Knights Templar and died in the Holy Land on September 23, 1193. At this point Marguerite had been married for two years to William des Roches, Seneschal of Anjou, a knight in the Third Crusade, she was second wife. Her father’s death made the young couple extrememly wealthy and William a very powerful man. The pair had three children, Robert who died young as his uncle before him, Jeanne and Clemence. William died on July 15, 1222.
She supported the two abbeys that her father founded. In 1200 she lands to the abbey at Perray aux Nonnains which her uncle added to. And in 1209 they had the abbey at Perray-Nauf moved to closer to Sable. In 1227 she donated to the nuns at the Abbey at Bonlieu to pray for the souls of her departed family. In 1235 she supported the monks at the Church of St. Nicholas of Sable.
Marguerite died in 1238 (around the same time as their daughter Jeanne) and is buried in Perray-aux-Nonnains, France while her heart is buried with William at the Abbey at Bonlieu.